Nylabone Advanced Oral Care Pet Dental Water Additive, Liquid Tartar Remover & Breath Freshener for Dogs, Dog Teeth-Cleaning, Peppermint Flavor, 16 oz.

Plaqueoff is very high in iodine (it’s made of kelp and seaweed) so it can cause thyroid issues/aggravate them (i.e. hyperthyroidism). If you continue to use it, this formula is the one for cats. That second formula from that brand is for dogs only, so I would not recommend giving that to your cat. The formula for cats is a bit different.